Table 4.
The relationship between pressure pain threshold (PPT) of the different muscles and chronic pain. We found no significant influence of job function, age, or smoking habits on PPT for either of the muscles.
| Dependent variable: PPT | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model 3 | Model 4 | Model 5 | |||||||
| Tibialis anterior | Extensor carpi radialis brevis | Infraspinatus | |||||||
| LS mean | 95% CI | p value (F-value) | LS mean | 95% CI | p value (F-value) | LS mean | 95% CI | p value (F-value) | |
| Status | 0.0023∗ (9.99) | <0.0001∗ (26.42) | 0.0006∗ (13.03) | ||||||
| Chronic pain | 805 | 701–910 | 639 | 554–725 | 573 | 494–652 | |||
| Pain-free | 1015 | 900–1130 | 918 | 824–1013 | 753 | 666–839 | |||
| Job position | 0.1021 (2.35) | 0.1500 (1.95) | 0.7458 (0.29) | ||||||
| Meat cutter | 806 | 721–891 | 763 | 694–833 | 635 | 571–699 | |||
| Meat packer | 877 | 751–1003 | 694 | 591–797 | 655 | 561–750 | |||
| Slaughterer | 1047 | 841–1253 | 879 | 710–1048 | 698 | 543–854 | |||
| Smoking | 0.0593 (3.67) | 0.1830 (1.81) | 0.0980 (2.81) | ||||||
| Yes | 977 | 847–1107 | 817 | 711–924 | 707 | 609–805 | |||
| No | 843 | 751–934 | 740 | 665–815 | 618 | 550–687 | |||
∗Statistically significant association between the PPT of respective muscle and status (chronic pain versus pain-free control) (p < 0.05).